Testing apparatus



N 1932- A. E. COLOSOFF TESTING APPARATUS Filed 001;. 5. 1951 INVENTOR. .A..E, CQLDSQFF: y

A TTORNEYS.

' 19 A further object is to produce a device ing a heavy'and light winding thereon, the

7 20 In the accompanying drawing forming a through a slot 17 formed between the tubu- Patented Nov. 22, 1932 v y UNITED STATES PATENT OFFICE ANA'I'OLY E. GOLOfiOFF, OI BERKELEY, CALIFORNIA.

'rns'rnw AEIABATUQ Application and October "a, 1931. Serial No. 566,731.

This invention relates to improvements in ferred embodiment oimy invention, the nutesting apparatus and has particular when unefal designates a tubular 'p'iece made of ence to a device for testing theelectric cirany material which is nofi-conducting- 2-A cuits of an automobile. contact wire 6 extends through thei'tubular 5 A further ob'ect is to produce a device piece 5 and has a. point 7 extending beyond 55 wherein either t e voltage or amperage may the end thereof and has its opposite extremity be checked, and also to provide visible means extending through and insulated from a whereby a break in the circuit may be depermanent U-shaped magnet 8, between the tected. lengths of which is positioned a coil 9, havwhich is easily assembled and one which is heavy winding being indicated at 11 in Fig amply protected against breakage in use. ure 5 and the light winding at 12, the same A. further object is to produce a device figure. The heavy winding serves as an wherein the user will be completely insulated amperage reading while the light winding 12 15 from the electric circuit and will, therefore, serves for a yoltage reading; This arrangenot receive a shock. ment is adapted to actuate apointer 13 car- Other objects and advantages will be apried upon a bearing pin 14, which bearing parent during the course of the following pin is positioned in ayoke 16 in such a inandescription. I, ner that the free end of the pointer extends part of this specification and in which like lar portion 5 and a cap 18. Thiscap carries numerals are employed to designate like an upstanding projection 19 having a reparts throughout the same, cessed groove 21. This groove serves to ro- Figure 1 is a side elevat'on of my device, tatably hold upon the portion 19, a divided Fi re 2 is a cross sectional view taken on housing 22, held together by screws 23. the hue 2-2 of Figure 1, I Within this housing 22 is positioned a re- Figure 3 is a top plan view of Figure-1, flector 24 so as to reflect light from a bulb 26 Fi re 4 is a cross sectional view taken on positioned within a bore 27 formed in the the hue 4-4 of Figures 1 and 2, upstanding portion 19.

Figure 5 is a diagrammatic view of the A lens i shown at 28 to r itth light to. 30 wiring of my device, shine therefrom. A contact 29 conducts curig r 6 is & e l v ion f the ampere rent to the bottom of the bore, and a contact meter pointer, and 31 conducts current to the side of the bore. Figure 7 is a top plan view of Figure A cable 32 extends from a spring contact 33 35 In e te ing f automobile clrcllits 1t 15 and has a clip 34 attached to its free end. often necessary to measure the voltage or Th Spring t t 3 i d t d t engage amperage at dlfierent P f also l? contacts 35, 36 and 37 when the housing 22 P Ph break may occur which break 15 is rotated on the upstanding portion 19 of not v1s1ble. In order to test theyoltage, conthe cap 18, the result being that as therotw 90 aig g g g gigggz 223 33: 2 3: 1 tion takes place a circuit may be established With the present device, should a break occur m the Pomt 7 through. elther the ings 11, 12 or through the light 38 and thence in the circuit, by connecting two opposite h h h M 2 d 34 sides of the break and by rotating the top of returaed t li 9 an 6 1p ThlS presentdevlce is an improvement over as the device a lamp may be thrown into circuit with the result that the current flowing y tester descl'lbed In y P Patent around the break, andthrough the device, -1,707,0 51, granted March 26th, 192. the will illuminate the lamp, difference in this case bemg 1n the details of In the accompanying drawing wherein'for construction which permit of a more read I y the purpose of illustration is shown a preassembly, a stronger device and one whlc I neeaeoe will more efiectively house the meter, thus tending to give a more accurate readin It is to be understood that the form 0t my invention herewith shown and described is to be taken as a preferred example of the same and that various changes relative to the material, size, shape and arrangement of arts may be resorted to without departing I'OIIl the s irit of the invention or the scope w of the subgoined claim.

' Having thus described my invention, I claim In a device of the character described, a tubular member, a conductor extending 35 through said tubular member, said tubular member having a recess formed therein, a magnet secured to said conductor and insulated therefrom, an electroma etic coil mounted between the legs of said magnet, said coil having a voltage windin and an amperage winding thereon, one end of each of said windings being connected to said conductor, the opposite ends of said windings being connected to contacts, a ca posiaa tioned on said tubular member and aving said contacts extending therethrough, an indicator positioned between said tubular memher and said cap, said indicator having its pointer adapted to move over indicia, a housso ing rotatably mounted on said cap, a cable secured to said housing, a bulb carried by said housing, a spring contact carried by said housing, and being connected to said cable whereby when said housing is rotated said no configact will engage said first mentioned contac In testimony whereof I am my signature,

ANATULY E, CULGSQFF. 

